Question

Why are road accidents at high speeds very much worse than road accidents at low speeds?

Answer 1

Vehicles with high speeds have high momenta (plural of momentum). When they come to rest in very small time they experience high forces
we know that rate of change of momentum is force, lower the time higher is force. So, slow moving vehicles experience less force. It is important to note that if any one vehicle involving has high speed it can do more damage both the vehicles involving.

Answer 2

The momentum makes it worse.

Step-by-step explanation:

The momentum of vehicles running at faster speeds is very high and causes a lot of damage to the vehicles.